Apparatus

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sensors Mode-S transponder

A20BC1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2306Y · CESSNA 177 Cardinal · operated by EAGLE SKY PATROL INC

Hex
A20BC1
Octal
50405701
Decimal
10,619,841
Country
US
Tail
N2306Y
Type
C177
No current signal · last broadcast Jun 26, 15:34 UTC
Flights observed
197
Distinct callsigns
1
Country
US
Last broadcast
Jun 26, 15:34 UTC

Last known position

Most recent position reported by Mode-S A20BC1.

Country allocation

The ICAO 24-bit address A20BC1 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N2306Y - 197 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 N2306Y - Jun 26, 15:05 UTCJun 26, 15:34 UTC30m
2026-06-26 N2306Y - Jun 26, 00:05 UTCJun 26, 01:10 UTC1h 5m
2026-06-25 N2306Y - Jun 25, 22:45 UTCJun 25, 23:30 UTC45m
2026-06-20 N2306Y - Jun 20, 02:35 UTCJun 20, 03:59 UTC1h 25m
2026-06-19 N2306Y - Jun 19, 23:34 UTCJun 20, 01:44 UTC2h 10m
2026-06-19 N2306Y - Jun 19, 21:49 UTCJun 19, 22:55 UTC1h 5m
2026-06-19 N2306Y - Jun 19, 20:55 UTCJun 19, 21:19 UTC25m
2026-06-19 N2306Y - Jun 19, 14:34 UTCJun 19, 16:34 UTC2h 0m
2026-06-18 N2306Y - Jun 18, 23:50 UTCJun 19, 02:54 UTC3h 4m
2026-06-18 N2306Y - Jun 18, 20:45 UTCJun 18, 21:20 UTC35m
2026-06-18 N2306Y - Jun 18, 19:55 UTCJun 18, 20:10 UTC15m
2026-06-18 N2306Y - Jun 18, 18:00 UTCJun 18, 18:15 UTC15m
2026-06-18 N2306Y - Jun 18, 14:55 UTCJun 18, 15:15 UTC20m
2026-06-18 N2306Y - Jun 18, 01:40 UTCJun 18, 02:55 UTC1h 15m
2026-06-17 N2306Y - Jun 17, 21:30 UTCJun 17, 23:50 UTC2h 20m
2026-06-17 N2306Y - Jun 17, 14:15 UTCJun 17, 16:45 UTC2h 30m
2026-06-17 N2306Y - Jun 17, 00:10 UTCJun 17, 01:25 UTC1h 15m
2026-06-16 N2306Y - Jun 16, 21:50 UTCJun 16, 22:50 UTC1h 0m
2026-06-16 N2306Y - Jun 16, 18:20 UTCJun 16, 18:35 UTC15m
2026-06-16 N2306Y - Jun 16, 16:05 UTCJun 16, 16:25 UTC20m
2026-06-16 N2306Y - Jun 16, 15:00 UTCJun 16, 15:35 UTC35m
2026-06-16 N2306Y - Jun 16, 13:40 UTCJun 16, 14:00 UTC20m
2026-06-16 N2306Y - Jun 16, 00:50 UTCJun 16, 01:10 UTC20m
2026-06-15 N2306Y - Jun 15, 18:45 UTCJun 15, 23:45 UTC5h 0m
2026-06-14 N2306Y - Jun 14, 15:15 UTCJun 14, 15:55 UTC40m
2026-06-14 N2306Y - Jun 14, 01:50 UTCJun 14, 03:15 UTC1h 25m
2026-06-13 N2306Y - Jun 13, 23:15 UTCJun 14, 01:00 UTC1h 45m
2026-06-13 N2306Y - Jun 13, 22:05 UTCJun 13, 22:35 UTC30m
2026-06-13 N2306Y - Jun 13, 20:00 UTCJun 13, 20:35 UTC35m
2026-06-13 N2306Y - Jun 13, 19:05 UTCJun 13, 19:25 UTC20m
2026-06-13 N2306Y - Jun 13, 17:30 UTCJun 13, 17:45 UTC15m
2026-06-13 N2306Y - Jun 13, 14:25 UTCJun 13, 14:45 UTC20m
2026-06-13 N2306Y - Jun 13, 00:10 UTCJun 13, 03:00 UTC2h 50m
2026-06-12 N2306Y - Jun 12, 22:45 UTCJun 12, 23:35 UTC50m
2026-06-12 N2306Y - Jun 12, 20:05 UTCJun 12, 20:45 UTC40m
2026-06-12 N2306Y - Jun 12, 15:20 UTCJun 12, 17:10 UTC1h 50m
2026-06-12 N2306Y - Jun 12, 14:01 UTCJun 12, 14:25 UTC25m
2026-06-11 N2306Y - Jun 11, 23:30 UTCJun 12, 02:05 UTC2h 35m
2026-06-11 N2306Y - Jun 11, 18:55 UTCJun 11, 19:15 UTC20m
2026-06-11 N2306Y - Jun 11, 17:55 UTCJun 11, 18:20 UTC25m
2026-06-11 N2306Y - Jun 11, 14:50 UTCJun 11, 15:25 UTC35m
2026-06-11 N2306Y - Jun 11, 01:00 UTCJun 11, 02:15 UTC1h 15m
2026-06-10 N2306Y - Jun 10, 22:40 UTCJun 11, 00:00 UTC1h 20m
2026-06-10 N2306Y - Jun 10, 21:00 UTCJun 10, 21:20 UTC20m
2026-06-10 N2306Y - Jun 10, 19:35 UTCJun 10, 20:30 UTC55m
2026-06-10 N2306Y - Jun 10, 12:30 UTCJun 10, 14:15 UTC1h 45m
2026-06-10 N2306Y - Jun 10, 00:45 UTCJun 10, 01:50 UTC1h 5m
2026-06-09 N2306Y - Jun 9, 22:30 UTCJun 9, 23:00 UTC30m
2026-06-09 N2306Y - Jun 9, 21:35 UTCJun 9, 21:55 UTC20m
2026-06-09 N2306Y - Jun 9, 20:00 UTCJun 9, 20:10 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N2306Y page for operator, model, and routing details .

Mode-S A20BC1 frequently asked

What is Mode-S code A20BC1?
A20BC1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2306Y.
Where is Mode-S A20BC1 registered?
Mode-S code A20BC1 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A20BC1 broadcasting right now?
No active broadcast right now. Last signal was Jun 26, 15:34 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20BC1, octal 50405701, decimal 10,619,841.
What flights does A20BC1 operate?
Mode-S A20BC1 has broadcast 1 distinct callsign, including N2306Y.